Pain Flashcards
A-beta fibers
non-noxious mechanical stimulus
A-delta fibers
noxious mechanical stimulus
C fiber
noxious heat and chemical stimuli
Are pain signals mainly contralateral or ipsilateral?
contralateral
arrange the following from least to most myelinated:
- A-delta fibers
- C fiber
- A-beta fibers
C fiber < A-delta < A-beta
nociception
neural encoding of pain
pain
unpleasant sensory and EMOTIONAL experience associated with actual/potential damage
analgesic
block pain sensation ONLY
local anesthetic
block nerve conduction and ALL sensation
general anesthetic
cause unconsciousness (not always analgesia)
hyperalgesia
enhanced response to painful stimulus
allodynia
generation of painful response to an innocuous stimulus
Which fiber is associated with first pain and second pain?
first pain = A-d fibers
second pain = C fibers
What is acute pain treated with?
local anesthetics
what is chronic/persistent pain caused?
release of bradykinin, histamine acid metabolites, and prostaglandins (inflammatory factors)